inactivity timeout for TCP connections at controller firewall?

I haven't found any piece of information about what is the firewall policy regarding TCP connection lifetimes matched by session ACL's.

Is ther any inactivity session timeout? could this be modified?

Similar parameters are documented, such as the global Session Idle Timeout (sec) for non-TCP connections, and another one reserved for VoIP sessions, but I haven't read anything about a other inactivity session timers. Do firewall sessions for TCP connections "live" forever?